}
    }

    /**
     * Removes <b>all</b> occurrences of the specified element from this multiset. This method
     * complements {@link Multiset#remove(Object)}, which removes only one occurrence at a time.
     *
     * @param element the element whose occurrences should all be removed
     * @return the number of occurrences successfully removed, possibly zero
     */

        }

        // Remove state for old versions of Gradle that we're unlikely to ever require again
        fileSystemOperations.removeOldVersionsFromDir(workerDir.dir("caches"), expireDistributionCache)

        // Remove scripts caches
        fileSystemOperations.removeCachedScripts(workerDir.dir("caches").asFile)

        // Remove script caches from TestKit integTest temp dir

      return delegate.poll();
    }

    @Override
    public E remove() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.remove();
    }

    @Override
    public boolean remove(Object object) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.remove(object);
    }

    @Override
    public @Nullable E peek() {

   *
   * @param removeFrom the iterable to (potentially) remove elements from
   * @param predicate a predicate that determines whether an element should be removed
   * @return {@code true} if any elements were removed from the iterable
   * @throws UnsupportedOperationException if the iterable does not support {@code remove()}.
   * @since 2.0
   */
  @CanIgnoreReturnValue

    AtomicLong atomic = map.get(key);
    if (atomic == null) {
      return false;
    }

    long oldValue = atomic.get();
    if (oldValue != value) {
      return false;
    }

    if (oldValue == 0L || atomic.compareAndSet(oldValue, 0L)) {
      // only remove after setting to zero, to avoid concurrent updates
      map.remove(key, atomic);

 *
 * <p>For instance, if <i>steps</i> is 5, one example sequence that will be tested is:
 *
 * <ol>
 *   <li>remove();
 *   <li>hasNext()
 *   <li>hasNext();
 *   <li>remove();
 *   <li>next();
 * </ol>
 *
 * <p>This particular order of operations may be unrealistic, and testing all 3^5 of them may be
 * thought of as overkill; however, it's difficult to determine which proper subset of this massive

    /* Should complain on attempt to remove() after peek(). */
    assertThrows(IllegalStateException.class, () -> peekingIterator.remove());

    assertEquals(
        "After remove() throws exception, peek should still be ok", "B", peekingIterator.peek());

    /* Should recover to be able to remove() after next(). */
    assertEquals("B", peekingIterator.next());
    peekingIterator.remove();

  }

  /**
   * A sensible, albeit inefficient, definition of {@link #remove} in terms of the {@code iterator}
   * method of {@link #entrySet}. If you override {@link #entrySet}, you may wish to override {@link
   * #remove} to forward to this implementation.
   *
   * <p>Alternately, you may wish to override {@link #remove} with {@code keySet().remove}, assuming
   * that approach would not lead to an infinite loop.
   *

    Write-Error "fail to move MAVEN_HOME"
  }
} finally {
  try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
  catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
}

              }

              @Override
              public @Nullable String remove(Object key) {
                return map.remove(key);
              }

              @Override
              public boolean remove(Object key, Object value) {
                return map.remove(key, value);
              }

              class EntrySet extends AbstractSet<Map.Entry<String, String>> {